Marine steering-gear.



Patented July 14,1914,

MARNE STEERING GEAR.

APFLLCOATION FILED MAB. 11, 1914.

LESLIE UAULDW'ELL BURNS, OF UNION HILL, lNEW' JERSEY.

MARINE STEERING-GEAR.

Specication of Letters Patent.

Patented Jury 14., i914..

Application led March 11, 1914. Serial No. 823,919.

To all whom it may concern:

Be it known that I, LESLIE CAULDWE'LL BUR-Ns, a citizen of the United 'States of America, and residing at Union Hill, in the county of Hudson and State of New Jersey, have invented a certain new and Improved Marine Steering-Grear, of which the following is `a specification.

My invention relates to marine steering gear and particularly to power operated gear, the object of my invention beingto improve the apparatus shown in my prior Patent 1,073,954 in the eatureshereinafter described and pointed out in the claims.

In the accompanying drawing, Figurel is a plan view of a steering apparatus in which my invention is embodied in one form; and Fig. 2 is a side elevation of the same.

In the apparatus shown in my prior patent above mentioned, the valves 12, 13, 14 and 15 are controlled from a disk geared directly to the hand wheel. quently necessary to turn the hand wheel at the upper end of spindle 2G or tolrelease Ait thereby permitting the return spring to act' in order to reestablish the normal valvepofi sition. `While this arrangement is satisfactory under many conditions, I have found" ously used. Instead of the bevel gear wheel of my prior construction however, I now pivot the links 11 to studs 17 on the oscillating disk 16 carried by the cylinder frame. To oscillate the disk and thereby actuate the valves, I provide it with a pin 1S engaged in an annular groove 19 in a sleeve 20 threaded on the screw 21 journaled in brack ets 22 on the cylinder frame. Collars 23 on the sleeve form a runway for the belt 24 which passes therefrom to the pulley 25 on the spindle of the bevel pinion v27. The latter meshes with the bevel gear 28 on the wheel spindle 26. Obviously upon the rotation of the spindle 26 by the hand wheel (not shown) the belt 21 rotates the sleeve 20 thus causing the latter to tiavel longitudi- It is consenally on the screw 21 and consequently oscillating the disk 16 and thus operating the valves which control the steam admission to and exhaust from the cylinder.

The automatic return of the valves to normal position is obtained through the travel of the piston rod. To this end the screw 21 is extended parallel to the piston rod to one side of the cylinder and a spiral groove 29 of any suitable predetermined pitch cut therein. A pin 30 carried by the cross head Sl'of thepiston rod 8, is engaged in said spiral groove 29.` l Consequently on the longitudinal displacement of the piston in one-direction or the other, the travel of the pin 30 in the groove 29 causes the screw21 -toiotate If the lielinsm-an has stopped rotating the handwvheel, the'sleeve is held against rotation by the friction of the belt,

butv travels longitudinally on the screw by reason .o t'- thel rotation the latter. This longitudinal movement of the sleeve returns ,the valves to normal position, and lthe rudder is thus relieved from duty.

Itwill be readily observed that through ythe present arrangement the hclmsman has only to operate kthe hand wheel iii the direction lie wishes to go, leaving the automatic :iet'urnof the rudder to be accomplished through `the shifting of the valve-operating sleevel 20lbyt'he rotation of the screw 21 during the travel of the piston rod. If it is desired totlirow the rudder full over to one side, it is only necessary that the helmsman ykeep'rotating his wheel at a speed su'llicient to prevent the return travel of the sleeve under the influenceoil the reverse rotation of the screw on the travel of the piston rod.

He thereby maintains the valve open and permits the steam to force the piston through its full stroke. This is readily ac complished by making the bevel gear 28 of greater diameter than the pinion 27 or through any other' suitable multiplying arrangement. To return the rudder to midposition it is now necessary to rotate 'the hand wheel in the opposite direction to restore the valves to normal position, and also to continue the rotation of the wheel in this direction during the travel of the piston back to mid-position, since otherwise the reverse rotation of the screw under the influence of the pin 30 would displace the valves again. The pitch of the spiral groove 29 may be predetermined as desired, as likewise the particular gear ratio, between the bevel iio gears 2?, 28,;while various changes inthe details of construction 'will readily suggest themselves. Li, claim as my inventionc- 1.,I In ,a motor of the ,character described,

in, a piston roe eXtendi-n-gbeyondthe end of the cylinder,I valves controlling the" adi" f :f1-lt QWln-fa' motor,v ofthe characteri described, t a pnessuie cyl1nder,-a. piston Working there-A ,imV a: piston. rod L extending ,beyond the Aend l f of; ythe Leylinder, valves for f adignitting`- fluid pressure-to-opposite faces offthefpistonfa A yscrew,v rod, ia sleeve threaded ..thereon,"meansj vcontrolled-by-said .sleeve Ltor operating'fsald i Svalvesmn the longitudinal .displacement of -.the1slegeve onsaidisereW rod,'nidnually op-l enated means torfroftating saidlhleevelonsaid modiee-'teet longitudinal:displacement:.of

l thesleeve7` andI means operated bythe etravel Vof vthe piston:` for'. rotatingasaid screw rod inI 30. ai v.direction 'toy efect.v longitudinal displace-f nient, of fthe sleeve in a; direction opposite to that in Whiohitihas'ibeentnaveled by-the ,finanually-operated.means.4 v. si; f i? f.' In '1a' motori of A thel character desoribechy aA .pessureoylinden a-,piston yWorking thereim a .piston rode'xtendingbeyondlthe lend'of lltheleylinder, Valves for admittingiuid Spressure:tolioppositeaees ot theypistony a screw rod-f, sleeve 'threaded thereonJf means con- 40. jtOlled by: saidsleevexifor. operating: saficljV pifvalveson ther longitudinaln displacement @t .thesl'eeye on said y serew` nod',y manually op-fl herated -meansforfrotating saidleeve on said s'. @rodtofeectlongitudinal displacement of 45'2 (the Sleeve, and. meensoperated by the travel ay pressure f cylinder, ia' piston Working thereof the piston for rotating said screw rod in direction 'to' ettectllongitudinal displacement of, the sleeve in a direction opposite to 4 thatY iny which it has been traveled by the manually opel-ated means, said Vnlarnially oontrolledl and piston controlledineans being capable of simultaneous operation.

4. In a motor of the character described,l

a pressure cylinder apiston Workingftherein, a piston rod extending beyond the end of. thecylinderivalves foradmittngluid pressure" to' yoppositefaces of the piston, la screw rod-parallel: :to the piston s sleeve threaded thereon and. operativelyy connected to the .Valves toy actute the latter, a: manually ,operated belt for rotating saidpsleeveon the screWrod,w an extension off-the screwrod :having/a spiral groove.cuttherein,v anda pin/ waged inl saidgroove to .i :effecty the2 rotation o? said sCreWQrOd, on ,the =travelfof thef'lpiston; substantially, as deon, the piston roden i V;5. lill a motor of the; .character described, :a pressure cylinder, va piston Working therein, apistonrod extendingbeyond lthe :end 1- of` lthe 1 .C5/lindert,y yValves; for admitting, iiuid pressure to the opposite faces of the pis ton,.a rotatable screwrod` arranged parallel .l

actuate the latter; manually. operated; means a for rotating said sleeve en the sei-ew rod, an extension -ofy :the latter. ,having a highy pitch; l :2 spiral groove therein ,and a pin on the piston' rod engaging said fgrooveto etl'ectgthe rotation? of said g screwl` rod. on.. the. tr'avel Vof the .piston,- .substantiallyas described'.4 1 i i tofthepiston,fay sleevey tlueaded on said'rod and operatively'connected tothe Valves to 11n testimonywwhereo l' have. vSigned myn,

namettogthis specification in the presence of two subscribing Witnesses.

gf j itnsniii onULgnWnnnnUnNs.

.Witnessesz- I QWALCIERABBE, y;

v"Vtlopiesoi' this patent may 'be obtained. for vel cents each, by addressing thef Commissioner of atents,

- lWenungen.,n.'C. f l v. f 

